Improvement in harvesters



W. HARRISON.

Harvesters.

vmovement of' the movable blades.

ward above the top of the wheel.

UNITED STATES WILLIAM HARRISON, or LINNEUs, MIssoURI, AssIenoR 0EONE-HALE Hrs l PATENT OFFICE. 1

RIGHT TO HENRY C. PREWITT, Oli"` SAME PLACE.

IMPROVEMENT IN HARVESTERS.`

. Specification forming' part of Letters Patent No. 139,787, dated June10, 1873; application tiled March 31, 1873. I

is a full, clear, and exact description, reference being had to theaccompanying drawing,

`and to the letters of reference marked thereon, in which- Figure 1 is aplan view, having a portion of the upper part of the driving-wheel andframe shown in section, taken in line .r zg-Fig. 2. A portion of the topof the finger-bar is removed to show the construction and arrangement ofthe'cutting-blades. The arrows indicate the Fig. 2fis a sectionalelevation taken in the line y y of Fig. 1.

Like letters indicate like parts.

To simplify and cheapen the construction, to lessen the draft, and toobtain a machine that can be readily used in all the positions and underall the conditions that occur in ordinary work, are mainly the objectsof my invention.

In the accompanying drawing, A represents a driving-wheel of ordinaryconstruction, provided inside and in its plane with a circular cam-way,B B1 B2 B3, that faces toward the linger-bar side. which thedriving-wheel is hung, consisting of two cross-pieces, c and c1,extending on either side across the wheel, being in length somewhat morethan the diameter of the driving-wheel, and of two upright pieces, c2c3, on either side of the wheel, and extending from the horizontalpieces c and c1 respectively up- Both the horizontal pieces and thevertical pieces c2 c3 are respectively united at their ends bycrosspieces c1 c3 c3, Figs. 1 and 2. The horizontal pieces c and c1 aresuitably and similarly provided with attachments, D and D', at theirends, to either of which the draft-pole can be `fastened. On thefinger-bar side of the machine a supplemental frame or upright, E, is

3 attached to the frame C by any suitable fastening. The upright E isprovided with slots e c1, extending in the direction of its length. Atits lower end the upright E is provided with a projection, e2, extendinga short dis- O represents the frame ini tance toward the linger-barside. To the outer end ot' the projection e2 is hingedthe finger-bar F,which, otherwise of ordinary construction, is provided with a doubleseries of guard-fingers, G G1 G2G3 and H H1 H2 H3, I

arranged respectively oneither side of the linger-bar, as shown in Fig.`1. The `guardugers G G1 G.2 G3 and H H1 H2 H3 are ofthe usual form, butat their rear ends on `top are u rigidly attached ,two-edged pointedblades 1:11 I2 I3 and J J1 'Ji J3, Fig. l. These lixed c blades arearranged horizontally just below c the level of the movable blades or`knives K K1 K2 K3, their outer pointed ends extending about as far asthe points of the movable blades. They project equally on both sides ofthe guard-lingers, to which they are 'attached. The finger-barisprovided with a top plate, f, that passes over the movable blades, andserves to cover and to hold them in position. K K1 K2 K3 representmovable blades or knives, as shown in Fig. 1. Their general shape isthat of a diamond, both ends being similar and pointed. They are pivotedat their ceutersto the center ot' the nger-bar F, and project equally onboth sides of the finger-bar. Betweenltheir centers and their points,and on both sides of, their centers respectively, they are also pivotedto two scythebars, L L', respectively. The Scythe-bars L L' extendlengthwise with the finger-bar, and along its edges andattheirfr innerends, are respectively pivoted to two pitmen, m m', Figs. l and 2, whichpitmen, in turn, are respectively pivoted -tothe lower ends of tworocking-levers, n n', Figs. l and 2. c The rockc ing-levers n n'extendupward respectively on each side of the upright E, and aresuitably connected at the cross-piece c so as4 to admit of a vibratingmotion. At their upper ends,

'its various parts,) the rocking-levers n n', and

the cam-way B B1 B2 B3, is such as to bring one roller, O, against thetop of a camjwhile the other roller, Q', is in the depression betweentwo cams, as shown in Fig. 1. "As the j driving-wheel -is turned `lth`eupper ends of the rocking-levers are successively thrown outward, whichmotion, being transmitted. to their respective Scythe-bars below, causesthem to vibrate, and the movable knives K K1 K2 K3 to oscillate on theircenters, as indicated by the arrows in Fig. l. It will be observed thatin its operation the knife K makes a drawing cut, and, also, owing tothe ixed blades I and J and their relative arrangement to the otherparts of the cutting apparatus, the distance that the movable knivestraverse to accomplish their work is consid erably less than that of anordinary rigid scythe. An advantage is also gained in applying theVpower between the central pivotsl of the movable knives K Kl K2 K3 andtheir points.

ish the draft. The machine being similarly constructedon both sides itcan be operated at will in either direction. `A further gainl The effectof each and all of theseadvant-ages described is to materially diminb9,made use of'.v Its position when"llpturlledi.l A

is Yindicated bythe large arrow, Fig. 2. .Ljs it is raised the innerends of the Scythe-bars, through their pitmen m m' press the lower endsof the rocking-levers in sufficiently to throw the rollers 0 o' out ofgear. the axle P can be extended and a second driving-wheel attached inthe usual manner. The seat is attached in the customary mode. To adjustthe ringer-bar vertically the upright E is moved up or down, and at thedesired position held by tightening the thumb-screws his WILLIAMHARRISON,

mark.

Witnesses :l

ALEX. W. MULLINs, Tiros. BROWNLEE.

If de sired,`

